The Windows command line tool «cipher.exe» can be used with the parameter /w to overwrite unused space on a volume, which makes deleted data irrecoverable. The progress indicators of the tool are vague, which led me to create a graphical user interface for the tool.

The small application measures the time of one write cycle and then counts down the measured time for the next two cycles. When the operation completes, the application indicates this with «done». The GUI is designed to mimic a digital control panel.

2013